STP648

    Low-Cycle Fatigue and Cyclic Deformation Behavior of Type 16-8-2 Weld Metal at Elevated Temperature

    Published: Jan 1978


      Format Pages Price  
    PDF Version (304K) 16 $25   ADD TO CART
    Complete Source PDF (5.1M) 16 $55   ADD TO CART


    Abstract

    The low-cycle fatigue behavior of Type 16-8-2 stainless steel weld metal deposited by the automatic submerged-arc process at 593 ° was investigated, and the results are compared with existing data for Type 316 stainless steel base metal. Tests were conducted under axial strain control and at a constant axial strain rate of 4 x 10−3 s−1 for continuous cyclic loadings as well as hold times at peak tensile strain. Uniform-gage specimens were machined longitudinally from the surface and root areas of a 25.4-mm-thick welded plate and tested in the as-welded condition. Results indicate that the low-cycle fatigue resistance of this weld metal is somewhat better than that of the base metal for continuous-cycling conditions and significantly better for tension hold-time tests. This is attributed to the fine duplex delta ferrite-austenite microstructure in the weld metal. The initial monotonic tensile properties and the cyclic stress-strain behavior of this material were also determined. Because the cyclic changes in mechanical properties are strain-history dependent, a unique cyclic stress-strain curve does not exist for this material.

    Keywords:

    fatigue tests, weldments, fatigue (materials), austenitic stainless steels, weld metal, cyclic deformation, elevated-temperature testing, test equipment, cyclic straining, strains, stresses


    Author Information:

    Raske, DT
    Mechanical engineer, Materials Science Division, Argonne National Laboratory, Argonne, Ill


    Paper ID: STP33389S

    Committee/Subcommittee: E08.05

    DOI: 10.1520/STP33389S


    CrossRef ASTM International is a member of CrossRef.